Hi, Dany,
For many years, I've used the Skywatch Elite, which may have now been replaced by the Skywatch Eole or the Skywatch Meteos. Here is a link for them in Australia:
www.radio-active.net.au/web3/ (just scroll down the page).
I'm not sure if either of the meters is still available: the more I hunted, the more confusing it became, but at least the link site said they had stock.
It's best features are the large display, the fact that you don't have to point it directly into the wind and the number of measurement systems available ie knots, m/s etc.
Laurie's suggestion of using the Beaufort system is also very good. The Brits use this all the time if you read their magazines and forums and it's good practice if you've left the wind meter at home or the battery has just died.
Hope this helps,
Regards,
WindmanV